The CEM DT-6650 Multifunction Installation Tester is a professional all-in-one instrument designed for comprehensive electrical safety testing and installation verification. It combines insulation resistance, earth resistance, loop impedance, voltage, RCD, PFC, and PSC testing in a single unit, providing fast and reliable measurements for a wide range of electrical applications. Featuring a 3.5-inch TFT colour display, Bluetooth connectivity, USB and SD card support, it offers an efficient and user-friendly solution for engineers, technicians, and electrical inspectors.
Features
- Multifunction installation tester designed for professional electrical safety and installation testing
- Combines insulation resistance, earth resistance, loop impedance, voltage, RCD, PFC, and PSC tests in one device
- Large 3.5-inch TFT colour display for clear and easy result interpretation
- High-current and low-current loop impedance testing for accurate measurements
- Automatic RCD testing with PASS / FAIL indication for quick compliance checks
- Wide voltage and frequency measurement capability for versatile applications
- Built-in data logging with SD card, USB, and Bluetooth connectivity
- Advanced safety features including Safe Earth detection and CAT III 600V protection
- Rechargeable Li-ion battery for portable and long-duration field use
- Robust and ergonomic design suitable for on-site, industrial, and laboratory environments
Technical Specifications
| Model | DT-6650 |
| Insulation Test Voltage | 125 V / 250 V / 500 V / 1000 V |
| Insulation Measurement Range | 0.125 ~ 4000 MΩ |
| Insulation Accuracy | ±(2% + 10 digits) |
| Low Resistance Range | 4 Ω ~ 400 Ω |
| Resistance Accuracy | ±(1.5% + 3 digits) |
| Continuity Test Current | ≥200 mA |
| Earth / Loop Resistance | 0.00 ~ 999 Ω |
| Voltage Range | 80 – 500 V (45 – 400 Hz) |
| Voltage Accuracy | ±(2% + 2 digits) |
| RCD Test Currents | x1/2, x1, x2, x5 |
| RCD Accuracy | 1.5% ~ 9% |
| Display | 3.5” TFT LCD (320 × 240 pixels) |
| Data Storage | SD card, internal memory, USB / Bluetooth transfer |
| Power Supply | Rechargeable Li-ion battery |
| Safety Standard | CAT III 600 V |
| Dimensions | 280 × 210 × 75 mm |
| Weight | Approx. 2.5 kg |











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